Roller tube for a roller blind



FIG. 1 is a perspective view of a roller tube for a roller blind;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The claim is shown with a symbolic break line at the rear of the article. Any portion of the article not shown forms no part of the claimed design. 

CLAIM The ornamental design for a roller tube for a roller blind, as shown and described. 